电容式电压互感器的误差,因其构成特点,包含分压器误差、电磁单元误差及电源频率变化和温度变化引起的附加误差等。
参考答案:对
Was it not until you began to work ___ how much time you had wasted?
A.did you realize
B.that you realized
C.did you not realize
D.that you didn’t realize
围术期预防应用抗生素的指征不包括()
A.肠道手术
B.开放性创伤手术
C.器官移植手术
D.患者年龄超过70岁的手术
E.切口接近感染区域的手术